[Mulgara-general] Performance of the commit operation

[Paul Gearon]

Errr, this is a very open ended question, so it's hard to answer.

Yes, the timing your describing does sound very slow, and it should be
possible to fix it, I'm just not sure where your problems are going to
lie.

For a start, I don't actually know how Fedora uses Mulgara.  I don't
know if they've embedded the server, connecting to it with RMI, SOAP,
or what.  I also don't know how transactions are handled - and this
can have a big impact.

Out of curiosity, are you able to run a server independently, and
store data quickly enough, or is this slow as well?  If it's fast with
Mulgara, then it's an issue with the Fedora interface (and I'll work
with Fedora to see what we can do to help there).  Otherwise, then
I'll try to help from the Mulgara end.

Paul

On Feb 5, 2008 11:33 AM, Schenk, Andre <Andre.Schenk at fiz-karlsruhe.de> wrote:
> Hi all,
>
> we are implementing a framework based on Fedora (www.fedora.org). The newest Fedora version supports Mulgara so we just had to change some properties in the configuration to take advantage of it.
>
> But with Mulgara we have discovered a massive loss in write speed (about 5 times slower than before). When playing with the Mulgara ItqlBean we found that the commit operation needs a relatively constant time of about 0,5s - 1s on our dual Opteron server machine, even on an empty triple store.
>
> Now my question is: Are there any configuration properties which could give some extra speed? Is this by any chance a known problem which may be fixed in a future version?
>
> Thanks for your help!
>
> Best regards,
>
> André
>
>
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